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Wiring a trailer doesn’t have to mean cutting into factory wires. This Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into your vehicle’s existing connectors. It’s a plug-and-play setup that skips the guesswork and keeps your factory wiring intact.
The harness includes a powered converter that draws power directly from the battery instead of the tail light circuit. That means your trailer’s running, turn, and brake lights get consistent, dependable power without overloading the vehicle’s electrical system.
The 4-flat connector covers all the essentials—running lights, turn signals, and brake lights—so you can tow safely and stay visible on the road. It’s the common connector style used on most small to mid-size trailers and plugs into standard trailer wiring.
Even if your vehicle didn’t come with a factory tow package, this harness is built to work as-is. Everything is pre-wired and ready to connect, giving you the trailer lighting you need with minimal effort.

Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews
Very easy install
Arrived quickly, exactly as described.
Work first time every time
The easiest hitch I’ve ever put on. Took about an hour. Illustrations and video was very helpful
Easy install only issue was the double-sided tape did not want to remain stuck to the control box, I used acetone to prep the surface and it would fall off after 2 or 3 minutes. Ended up adding zip-ties to hold it in place.
Works great, no problems
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